On 24.08.21 14:48, Ivan Jiang via Xenomai wrote: > Dear guys: > > > > Can I use ftrace to analysis the kernel with patch of ipipe. > > I find if use function_graph whe kernel will crash like below: > > echo function_graph > current_tracer > > root@smarc-rzg2l:/sys/kernel/debug/tracing# [ 377.392724] Kernel panic - not > syncing: kernel stack overflow > > [ 377.399125] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted > 4.19.140-cip33-g6634f0243a91 #3 > > [ 377.407929] Hardware name: RZG2L Evaluation Board Kit (Discrete Power > System Ver.) (Dual Cortex-A55) (DT) >
That's ARM64 and I-pipe - might not have been tested / fully enabled in that combination. Try 5.10 with the dovetail patch, there ftrace is known to work better. Alternatively: the I-pipe tracer should work on arm64 (though without a nice function graph). Jan -- Siemens AG, T RDA IOT Corporate Competence Center Embedded Linux
